JP2022167512A - Processing program generation method and processing program generation device - Google Patents

Abstract

To effectively utilize an existing processing program including tendency in the case of applying various corrections to a machine tool.SOLUTION: A processing program generation method to be disclosed is a method for generating a third processing program to be used to process a work-piece on the basis of a first processing program and an existing second processing program including tendency, and includes a first step for generating the first processing program on the basis of shape data of the work-piece and machine accuracy and/or a spatial error of a machine tool to be used to process the work-piece, and comparing first tool path information of the first processing program with second tool path information of the second processing program to acquire coincident points and different points of both, and a second step for generating the third processing program by replacing the first tool path information of the first processing program with the second tool path information on the basis of the coincident points between the first tool path information and the second tool path information.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a machining program generation method and a machining program generation device.

Conventionally, a method for correcting a three-dimensional positional error of a spindle (or a feed shaft) of a machine tool is known (for example, Patent Document 1). In the method of Patent Document 1, a coordinate system is divided into grid-like regions at regular intervals in the direction of each coordinate axis, and grid point correction vectors measured in advance at grid points of the grid-like regions are stored. Then, the three-dimensional positional error of the spindle is corrected based on the stored grid point correction vector and the current position of the spindle. Hereinafter, the three-dimensional positional error of the spindle of the machine tool will be referred to as spatial error, and the correction of spatial error by the method of Patent Document 1 or a similar method will be referred to as spatial error correction.

JP-A-8-152909

A machine tool processes a workpiece based on a machining program. The machining program includes tool path information, which is information about the movement path of the spindle, and machining condition information (for example, feed rate information) set with the tool path information. Among other things, the existing machining program is compatible with the temperature environment where the machine tool is installed, the spatial error and machine accuracy of the machine tool (e.g. spindle deflection, squareness of two planes, etc.), and the convenience of assembly. may include trending and machining condition information optimized for the trended toolpath information.

Here, "tending" means that when a machining program generated based on workpiece shape data (that is, a machining program assuming an ideal machine tool with zero errors) is applied to an actual machine tool as it is. This is information for correcting the tool path information so as to offset the machining error that occurs. Such trending and machining condition information optimized for this are information that largely depends on the know-how of skilled engineers, and it is desirable to effectively utilize existing machining programs including trending.

By the way, spatial error correction and correction corresponding to machine accuracy (specifically, replacement of parts, angle adjustment of components, etc., hereinafter referred to as machine accuracy correction) may be newly applied to machine tools. . In this case, if the machine tool before the application of various corrections was properly machining the work based on the existing machining program including the trending, the application of the corrections would rather increase the machining error. There is In other words, if spatial error correction or machine precision correction is applied to machine tools, a situation may arise in which existing machining programs, including trending, cannot be utilized. Under such circumstances, one of the purposes of the present disclosure is to effectively utilize existing machining programs including trending when applying various corrections (spatial error correction and/or machine accuracy correction) to machine tools. do.

One aspect of the present disclosure relates to a machining program generation method. The machining program generation method is a method for generating a third machining program used for machining a workpiece based on a first machining program and an existing second machining program including a tendency, wherein the first machining program is generated based on the shape data of the workpiece and the machine accuracy and/or spatial error of a machine tool used for machining the workpiece, and the first tool path information of the first machining program and the second machining program A first step of comparing the second tool path information of the first machining program to determine points of agreement and differences between the two, and the points of agreement between the first tool path information and the second tool path information of the and a second step of generating the third machining program by replacing the first toolpath information with the second toolpath information.

Another aspect of the present disclosure relates to a machining program generation method. The machining program generation method is a method for generating a third machining program used for machining a workpiece based on a first machining program and an existing second machining program including a tendency, wherein the first machining program is generated based on the shape data of the workpiece and the machine accuracy and/or spatial error of a machine tool used for machining the workpiece, and the first tool path information of the first machining program and the second machining program A first step of comparing the second tool path information of the second machining program to determine points of agreement and differences between the two, and the points of difference between the first tool path information and the second tool path information of the second machining program and a second step of generating the third machining program by replacing second toolpath information with the first toolpath information.

Another aspect of the present disclosure relates to a machining program generation device. The machining program generation device is a device for generating a third machining program used for machining a workpiece based on a first machining program and an existing second machining program including a tendency, wherein the first machining program is generated based on the shape data of the workpiece and the machine accuracy and/or spatial error of a machine tool used for machining the workpiece, and the first tool path information of the first machining program and the second machining program A tool path comparison unit that compares the second tool path information and finds points of agreement and differences between the two, and a point of agreement between the first tool path information and the second tool path information for the first machining program A program generation unit that generates the third machining program by replacing the first tool path information with the second tool path information.

Another aspect of the present disclosure relates to a machining program generation device. The machining program generation device is a device for generating a third machining program used for machining a workpiece based on a first machining program and an existing second machining program including a tendency, wherein the first machining program is generated based on the shape data of the workpiece and the machine accuracy and/or spatial error of a machine tool used for machining the workpiece, and the first tool path information of the first machining program and the second machining program A tool path comparison unit that compares the second tool path information and finds points of agreement and difference between the two, and a tool path comparison unit that compares the points of difference between the first tool path information and the second tool path information for the second machining program. A program generation unit that generates the third machining program by replacing the second tool path information with the first tool path information.

According to the present disclosure, existing machining programs including tending can be effectively utilized when applying various corrections to a machine tool.

1 is a block diagram showing the configuration of a machining program generation device of the present disclosure; FIG. 4 is a flowchart showing a machining program generation method of Embodiment 1; 9 is a flowchart showing a machining program generation method of Embodiment 2;

An embodiment of a machining program generation method and a machining program generation device according to the present disclosure will be described below with examples. However, the disclosure is not limited to the examples described below. In the following description, specific numerical values and materials may be exemplified, but other numerical values and materials may be applied as long as the effects of the present disclosure can be obtained.

(Machining program generation method)
A machining program generation method according to the present disclosure is a method of generating a third machining program used for machining a workpiece based on a first machining program and an existing second machining program including tendencies.

The first machining program is generated based on the work shape data and the machine accuracy and/or spatial error of the machine tool used for machining the work. For example, when spatial error correction is applied to a machine tool, the first machining program may be generated based on workpiece shape data and the spatial error of the machine tool. On the other hand, for example, when applying machine accuracy correction to a machine tool, the first machining program may be generated based on the shape data of the workpiece and the machine accuracy of the machine tool. The first tool path information, which is the tool path information of the first machining program, may be used for machining the workpiece with respect to the movement path of the spindle, but does not include know-how information (for example, information about the feed rate of the spindle). There is room for improvement in According to the machining program generation method according to the present disclosure, the improvement can be realized.

Here, the machine tool includes, for example, a lathe, a machining center, a multitasking machine having a turning function using a fixed tool and a milling function using a rotating tool, or an additive manufacturing (AM) machine capable of metal addition processing. include, but are not limited to.

The machining program generation method according to the present disclosure includes two methods. Hereinafter, one of them may be referred to as a machining program generation method A, and the other as a machining program generation method B. Machining program generation method A and machining program generation method B each include a first step and a second step.

In the first step of the machining program generation method A and the machining program generation method B, the first tool path information of the first machining program and the second tool path information, which is the tool path information of the second machining program, are compared. find the similarities and differences between For example, in the first tool path information and the second tool path information, while the movement paths of the spindle corresponding to the first surface of the work match each other, the spindle corresponding to the second surface of the work different from the first surface are different from each other. In this case, the portions of the first tool path information and the second tool path information corresponding to the first surface of the work become points of mutual coincidence, and the second tool path information of the first tool path information and the second tool path information correspond to the second surface of the work. are different from each other.

In the second step of the machining program generation method A, the third machining is performed by replacing the first tool path information of the first machining program with the second tool path information for the matching points of the first tool path information and the second tool path information. Generate a program. Taking the above case as an example, the first tool path information of the first machining program is replaced with the second tool path information for the portion corresponding to the first surface of the work, while the portion corresponding to the second surface of the work is The first tool path information of the first machining program is used as it is. As a result, a third machining program is generated that includes the same movement path of the spindle as that of the first machining program, and that can utilize at least part of the know-how information included in the second machining program.

In the second step of the machining program generation method B, regarding the difference between the first tool path information and the second tool path information, the second tool path information of the second machining program is replaced with the first tool path information to perform the third machining. Generate a program. Taking the above case as an example, for the portion corresponding to the second surface of the work, the second tool path information of the second machining program is replaced with the first tool path information, while for the portion corresponding to the first surface of the work, The second tool path information of the second machining program is used as it is. As a result, a third machining program is generated that includes the same movement path of the spindle as that of the first machining program, and that can utilize at least part of the know-how information included in the second machining program.

The machining program generation method may further include a third step of issuing a warning when the machine accuracy of the machine tool that cannot be handled by spatial error correction is an abnormal value (that is, a value outside a predetermined allowable range). good. This makes it possible to notify the operator of the need to modify the hardware of the machine tool.

(Machining program generator)
A machining program generation device according to the present disclosure is a device that generates a third machining program used for machining a workpiece based on a first machining program and an existing second machining program including a tendency.

The first machining program is generated based on the work shape data and the machine accuracy and/or spatial error of the machine tool used for machining the work. For example, when spatial error correction is applied to a machine tool, the first machining program may be generated based on workpiece shape data and the spatial error of the machine tool. On the other hand, for example, when applying machine accuracy correction to a machine tool, the first machining program may be generated based on the shape data of the workpiece and the machine accuracy of the machine tool. The first tool path information, which is the tool path information of the first machining program, may be used for machining the workpiece with respect to the movement path of the spindle, but does not include know-how information (for example, information about the feed rate of the spindle). There is room for improvement in According to the machining program generation device according to the present disclosure, the improvement can be realized.

The machining program generation device according to the present disclosure includes two types. Hereinafter, one of them may be referred to as a machining program generation device A, and the other may be referred to as a machining program generation device B. The machining program generation device A and the machining program generation device B each include a tool path comparison section and a program generation section.

The tool path comparison units of the machining program generation method A and the machining program generation method B compare the first tool path information of the first machining program with the second tool path information, which is the tool path information of the second machining program, Look for points of agreement and points of difference between the two. For example, in the first tool path information and the second tool path information, while the movement paths of the spindle corresponding to the first surface of the work match each other, the spindle corresponding to the second surface of the work different from the first surface are different from each other. In this case, the portions of the first tool path information and the second tool path information corresponding to the first surface of the work become points of mutual coincidence, and the second tool path information of the first tool path information and the second tool path information correspond to the second surface of the work. are different from each other.

The program generation unit of the machining program generation device A replaces the first tool path information of the first machining program with the second tool path information for the matching point of the first tool path information and the second tool path information, thereby performing the third machining. Generate a program. Taking the above case as an example, the first tool path information of the first machining program is replaced with the second tool path information for the portion corresponding to the first surface of the work, while the portion corresponding to the second surface of the work is The first tool path information of the first machining program is used as it is. As a result, a third machining program is generated that includes the same movement path of the spindle as that of the first machining program, and that can utilize at least part of the know-how information included in the second machining program.

The program generation unit of the machining program generation device B replaces the second tool path information of the second machining program with the first tool path information to solve the difference between the first tool path information and the second tool path information. Generate a program. Taking the above case as an example, for the portion corresponding to the second surface of the work, the second tool path information of the second machining program is replaced with the first tool path information, while for the portion corresponding to the first surface of the work, The second tool path information of the second machining program is used as it is. As a result, a third machining program is generated that includes the same movement path of the spindle as that of the first machining program, and that can utilize at least part of the know-how information included in the second machining program.

The machining program generation device may further include a warning unit that issues a warning when the machine accuracy of the machine tool that cannot be handled by spatial error correction is an abnormal value (that is, a value outside a predetermined allowable range). . This makes it possible to notify the operator of the need to modify the hardware of the machine tool.

As described above, according to the present disclosure, existing machining programs including tending can be effectively utilized when applying various corrections to a machine tool.

An example of a machining program generation method and a machining program generation device according to the present disclosure will be specifically described below with reference to the drawings. The steps and components described above can be applied to the steps and components of the exemplary machining program generation method and machining program generation apparatus described below. The steps and components of the exemplary machining program generation method and machining program generation apparatus described below can be modified based on the above description. Also, the matters described below may be applied to the above embodiments. Of the steps and components of the example machining program generation method and machining program generation device described below, the steps and components that are not essential to the machining program generation method and machining program generation device according to the present disclosure may be omitted. . It should be noted that the drawings shown below are schematic and do not accurately reflect the actual shape and number of members.

<<Embodiment 1>>
A first embodiment of the present disclosure will be described. As shown in FIG. 1 , the machining program generation device 10 of this embodiment includes an input device 20 and a control device 30 .

The input device 20 is configured by, for example, an operation panel (not shown) provided in the machine tool. The input device 20 has a measurement result input section 21 , a result display section 22 and a calculation section 23 .

The measurement result input unit 21 receives input from the operator of the measurement result of the machine accuracy of a machine tool (not shown) used for machining the workpiece. The measurement result input unit 21 further receives input of data on the spatial error of the machine tool by the operator. The input measurement results and spatial error data are sent to the result display unit 22 and the calculation unit 23, respectively. The measurement result input unit 21 may be configured by a touch panel, for example.

Machine tool accuracy data includes, for example, the perpendicularity of the XY plane, the perpendicularity of the YZ plane, the perpendicularity of the ZX plane, the deflection of the spindle, the parallelism between the table and the X-axis, the parallelism between the table and the Z-axis. and straightness in the Y-axis direction.

The result display unit 22 displays the measurement results and spatial error data input to the measurement result input unit 21 in a visible manner. The result display unit 22 indicates that the data of the measurement results that cannot be handled by spatial error correction (among the above data, the parallelism between the table and the X-axis direction, and the parallelism between the table and the Z-axis direction) are abnormal values. If so, issue a warning to the operator. The result display unit 22 may be configured by a touch panel, for example. The result display section 22 is an example of a warning section.

The calculation unit 23 sends the measurement result and spatial error data input to the measurement result input unit 21 to the control device 30 . The calculation unit 23 may calculate the machine accuracy of the machine tool that can be obtained by calculation. For example, the calculation unit 23 may calculate the straightness in the Y-axis direction based on the perpendicularity of the YZ plane and the parallelism between the table and the Z-axis direction.

The control device 30 includes a CPU and a storage device that stores programs executable by the CPU. The control device 30 has a program storage section 31 , a tool data storage section 32 , a program analysis and editing section 33 , an analysis result storage section 34 and a drive control section 35 .

The program storage unit 31 stores an existing second machining program including trending. The second machining program includes second tool path information, which is information about the movement path of the spindle of the machine tool, and second machining condition information set with the second tool path information. The second tool path information and the second machining condition information are also information in which know-how based on past machining results is accumulated. Information on the second machining program is sent to the program analysis/editing unit 33 .

The tool data storage unit 32 stores data on tools (not shown) attached to the spindle of the machine tool. For example, the tool data storage unit 32 may store data on the type and size (for example, diameter) of the tool. Data about the tool is sent to the program analysis/editing section 33 .

The program analysis and editing unit 33 is a machining program (hereinafter referred to as a CAM program) to generate a first machining program including first tool path information. For example, the program analysis/editing unit 33 may generate the first toolpath information by adding modifications corresponding to machine precision and spatial error to the toolpath information of the CAM program. The first tool path information regarding the movement path of the spindle of the machine tool may be used for machining the workpiece. On the other hand, the first machining program does not include know-how related to machining condition information. However, the first machining program may include know-how related to machining condition information.

Based on the first machining program and the second machining program sent from the program storage unit 31, the program analysis/editing unit 33 generates a third machining program used for machining the workpiece. Specifically, the program analysis/editing unit 33 compares the first tool path information of the first machining program and the second tool path information of the second machining program to obtain points of agreement and points of difference between the two. Then, the program analysis/editing unit 33 generates the third machining program by replacing the first tool path information of the first machining program with the second tool path information for the points of coincidence between the two. The program analysis/editing unit 33 may generate the third machining program in consideration of the tool data sent from the tool data storage unit 32 . Information on the third machining program is sent to the analysis result storage unit 34 . The program analysis/editing unit 33 is an example of a tool path comparison unit and a program generation unit.

The analysis result storage unit 34 stores information on the third machining program sent from the program analysis/editing unit 33 . Information on the third machining program is sent to the drive control unit 35 .

The drive control unit 35 controls the drive unit 40 included in the machine tool used for machining the workpiece based on the third machining program sent from the analysis result storage unit 34 . A main shaft (not shown) of the machine tool is driven by the driving section 40 controlled based on the third machining program to machine the workpiece.

- Machining program generation method -
A machining program generation method that can be executed by the above-described machining program generation device 10 will be described. Note that the machining program generation method may be executed by a device or system having other configurations.

As shown in FIG. 2, the machining program generation method includes a first step (S11) and a second step (S12).

In the first step, the program analysis/editing unit 33 compares the first tool path information of the first machining program and the second tool path information of the second machining program to determine points of agreement and points of difference between the two. For example, each of the first tool path information and the second tool path information includes data on the movement path of the spindle corresponding to the first surface of the work (hereinafter referred to as first path data) and the spindle movement path corresponding to the second surface of the work. (hereinafter referred to as second path data) and data of the spindle movement path corresponding to the third surface of the workpiece (hereinafter referred to as third path data). In this case, the program analysis/editing unit 33 determines whether the first path data of the first tool path information and the first path data of the second tool path information match or differ from each other. The same applies to the second route data and the third route data.

In the second step, the program analysis and editing unit 33 replaces the first tool path information of the first machining program with the second tool path information for the matching point of the first tool path information and the second tool path information, thereby creating a third tool path information. Generate a machining program. Here, as an example, in the first tool path information and the second tool path information, while the first path data and the second path data match each other, the third path data are different from each other. In this case, the program analysis/editing unit 33 replaces the first path data and the second path data of the first tool path information with the first path data and the second path data of the second tool path information, while replacing the first tool path data and the second path data of the second tool path information. The third route data of information is used as it is. As a result, the third tool path information of the third machining program includes the first path data of the second tool path information, the second path data of the second tool path information, and the third path data of the first tool path information. will include As for the former two, the processing condition information (second processing condition information) including the know-how accumulated in the past is set as described above, and the know-how can be effectively utilized.

The machining program generation method may further include a third step.

In the third step, the result display unit 22 issues a warning when the machine accuracy of the machine tool that cannot be dealt with by the spatial error correction is an abnormal value. For example, the result display unit 22 may display a warning screen, emit a warning sound, emit warning light, or combine them as appropriate.

<<Embodiment 2>>
A second embodiment of the present disclosure will be described. This embodiment differs from the first embodiment in the operation of the program analysis/editing unit 33 . Differences from the first embodiment will be mainly described below.

Based on the first machining program and the second machining program sent from the program storage part 31, the program analysis/editing unit 33 of the present embodiment generates the third machining program used for machining the workpiece. Specifically, the program analysis/editing unit 33 compares the first tool path information of the first machining program and the second tool path information of the second machining program to obtain points of agreement and points of difference between the two. Then, the program analysis/editing unit 33 replaces the second tool path information of the second machining program with the first tool path information to generate the third machining program. The program analysis/editing unit 33 may generate the third machining program in consideration of the tool data sent from the tool data storage unit 32 . The program analysis/editing unit 33 is an example of a tool path comparison unit and a program generation unit.

- Machining program generation method -
As shown in FIG. 3, the machining program generation method includes a first step (S21) and a second step (S22).

In the first step, the program analysis/editing unit 33 compares the first tool path information of the first machining program and the second tool path information of the second machining program to determine points of agreement and points of difference between the two. For example, each of the first tool path information and the second tool path information includes data on the movement path of the spindle corresponding to the first surface of the work (hereinafter referred to as first path data) and the spindle movement path corresponding to the second surface of the work. (hereinafter referred to as second path data) and data of the spindle movement path corresponding to the third surface of the workpiece (hereinafter referred to as third path data). In this case, the program analysis/editing unit 33 determines whether the first path data of the first tool path information and the first path data of the second tool path information match or differ from each other. The same applies to the second route data and the third route data.

In the second step, the program analysis and editing unit 33 replaces the second tool path information of the second machining program with the first tool path information to solve the difference between the first tool path information and the second tool path information. Generate a machining program. Here, as an example, in the first tool path information and the second tool path information, while the first path data and the second path data match each other, the third path data are different from each other. In this case, the program analysis/editing unit 33 replaces the third path data of the second tool path information with the third path data of the first tool path information, and replaces the first path data and the second path data of the second tool path information with the third path data of the first tool path information. Use the data as is. As a result, the third tool path information of the third machining program includes the first path data of the second tool path information, the second path data of the second tool path information, and the third path data of the first tool path information. will include As for the former two, the processing condition information (second processing condition information) including the know-how accumulated in the past is set as described above, and the know-how can be effectively utilized.

INDUSTRIAL APPLICABILITY The present disclosure can be used for a machining program generation method and a machining program generation device.

10: Machining program generation device 20: Input device 21: Measurement result input unit 22: Result display unit (warning unit)
23: Operation unit 30: Control device 31: Program storage unit 32: Tool data storage unit 33: Program analysis and editing unit (tool path comparison unit, program generation unit)
34: Analysis result storage unit 35: Drive control unit 40: Drive unit

Claims (6)

A method for generating a third machining program for machining a workpiece based on a first machining program and an existing second machining program including tending, comprising:
The first machining program is generated based on shape data of the workpiece and machine accuracy and/or spatial error of a machine tool used for machining the workpiece,
a first step of comparing the first tool path information of the first machining program and the second tool path information of the second machining program to determine points of agreement and points of difference;
generating the third machining program by replacing the first tool path information of the first machining program with the second tool path information for a matching point of the first tool path information and the second tool path information; 2 steps;
A machining program generation method comprising: A method for generating a third machining program for machining a workpiece based on a first machining program and an existing second machining program including tending, comprising:
The first machining program is generated based on shape data of the workpiece and machine accuracy and/or spatial error of a machine tool used for machining the workpiece,
a first step of comparing the first tool path information of the first machining program and the second tool path information of the second machining program to determine points of agreement and points of difference;
Regarding the difference between the first tool path information and the second tool path information, the third machining program is generated by replacing the second tool path information of the second machining program with the first tool path information. 2 steps;
A machining program generation method comprising: 3. The machining program generation method according to claim 1, further comprising a third step of issuing a warning when a machine accuracy of said machine tool that cannot be dealt with by spatial error correction is an abnormal value. A device for generating a third machining program used for machining a workpiece based on a first machining program and an existing second machining program including tending,
The first machining program is generated based on shape data of the workpiece and machine accuracy and/or spatial error of a machine tool used for machining the workpiece,
a tool path comparison unit that compares the first tool path information of the first machining program and the second tool path information of the second machining program to determine points of agreement and points of difference between the two;
A program for generating the third machining program by replacing the first tool path information of the first machining program with the second tool path information for a matching point of the first tool path information and the second tool path information a generator;
A machining program generation device. A device for generating a third machining program used for machining a workpiece based on a first machining program and an existing second machining program including tending,
The first machining program is generated based on shape data of the workpiece and machine accuracy and/or spatial error of a machine tool used for machining the workpiece,
a tool path comparison unit that compares the first tool path information of the first machining program and the second tool path information of the second machining program to determine points of agreement and points of difference between the two;
A program for generating the third machining program by replacing the second tool path information of the second machining program with the first tool path information regarding the difference between the first tool path information and the second tool path information a generator;
A machining program generation device. 6. The machining program generation device according to claim 4, further comprising a warning unit that issues a warning when a machine accuracy of said machine tool that cannot be dealt with by spatial error correction is an abnormal value.

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